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Lithium-ion battery filling polymer composition, filling method and lithium battery and application

A lithium-ion battery and composition technology, which is applied to battery components, secondary batteries, battery boxes/coatings, etc., can solve problems such as long processing procedures, low volumetric energy density, and potential safety hazards, and achieve consensus Improved performance, improved volumetric energy density, and low price

Active Publication Date: 2016-05-18
GUIZHOU ZHENHUA E CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem solved by the present invention is: in the prior art, the processing flow of the lithium ion secondary battery (group) is too long, the volume energy density is low, and there are still hidden dangers in the safety, which needs to be further improved to meet commercial production

Method used

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  • Lithium-ion battery filling polymer composition, filling method and lithium battery and application
  • Lithium-ion battery filling polymer composition, filling method and lithium battery and application
  • Lithium-ion battery filling polymer composition, filling method and lithium battery and application

Examples

Experimental program
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Effect test

Embodiment 1

[0081] Embodiment 1 Bare cell preparation

Embodiment 1-1

[0082] Example 1-1 Cylindrical Bare Cell (Standard 18650 Cylindrical Cell)

[0083] The bare electric core in the present invention refers to the physical structure of the electric core that has removed the packaging shell and has not been filled with electrolyte, which contains a positive pole piece (containing the positive pole lug), a negative pole piece (containing the negative pole lug), and The assembly of CelgardM825 separator (the separator used in the following examples is the same as this) structure, as an embodiment of the present invention, saves the Vent (pressure reversal device) and CID ( Thermistor), but it contains physical structures such as upper / lower insulating plastic circular gaskets; the positive plate is coated on 14μm thick electronic grade aluminum foil and compacted (4.0g / cm 3 ) lithium cobalt oxide positive electrode active material coating, and aluminum tabs are welded by laser at the head or middle of the pole piece. The negative electrode sheet...

Embodiment 1-2

[0085] Example 1-2 Preparation of square bare cells

[0086] The compacted and welded positive electrode sheet, separator, and negative electrode sheet are prepared into qualified square bare cells according to the conventional lamination and winding process. Among them, the positive electrode sheet is coated on a 14 μm thick electronic grade aluminum foil and compacted (4.0g / cm 3 ) lithium cobalt oxide positive electrode active material coating, and aluminum tabs are welded by laser at the head or middle of the pole piece. The negative electrode sheet is coated on 9 μm thick electronic grade copper foil and compacted containing graphite (BTR818, 1.55g / cm 3 ) negative electrode active material coating, nickel lugs are laser welded along the width direction at the head or middle of the pole piece, and the positive / negative lugs are the current / voltage lead-in and lead-out ends. The size of the bare cell is 210mm in length, 110mm in width, 30mm in thickness, and the design cap...

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Abstract

A lithium-ion battery filling polymer composition, filling method, lithium battery and application, the polymer composition contains 55-65 parts by weight of polymer and 1-5 parts by weight of curing agent and is used to improve mechanical strength 1-17 parts by weight of pigments and or fillers; the filling method includes: 1) placing the bare lithium-ion battery cell monomer in a filling mold, and opening the mold by adding the polymer composition slurry of the present invention 2) Then close the exhaust valve, pressurize to 5-15MPa, and keep the pressure until the slurry solidifies and does not flow; 3) Then open the exhaust valve to normal pressure, Perform drying; disassemble the mold, and then obtain a lithium-ion battery cell or assembly by re-injecting the electrolyte. The filling and assembling method is formed at one time, and the formed battery pack has the advantages of compact structure, low price, safe and reliable operation, excellent battery chemical contact interface, and improved consistency. It is suitable for mobile power supplies, electric vehicles, power grid power stations and other equipment and facilities .

Description

technical field [0001] The invention relates to the field of lithium-ion secondary batteries, in particular to a lithium-ion battery filling polymer composition, a filling method, lithium batteries and applications, in particular to a design for improving the installation efficiency of lithium-ion secondary battery packs and reducing costs The developed filling process uses a two-component polymer to fill and mold the assembled lithium battery (group) and its components, which greatly improves the traditional lithium battery manufacturing process. The structure of the battery It is more compact and integrates and reduces the current upstream and downstream processing procedures of the battery. The lithium battery pack using this invention can be applied to mobile storage equipment, electric tools, electric vehicles and energy storage power stations. The energy density and safety of the battery Performance has been further improved. Background technique [0002] Due to the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/08H01M10/058H01M10/0525H01M50/195
CPCH01M10/0525H01M10/058H01M50/183Y02E60/10Y02P70/50
Inventor 向黔新李路梅铭赵孝连
Owner GUIZHOU ZHENHUA E CHEM INC